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Format, convert, and validate - without leaving your browser.

239 free developer tools - formatters, converters, validators, and generators. Most run entirely in your browser, with no account needed.

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239Free developer tools
7Categories
Browser-basedMost tools run locally
No sign-upFree to use

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JSON Formatter & Validator

Beautify, validate, and minify JSON instantly in your browser.

Base64 Encoder & Decoder

Convert text to and from Base64 encoding instantly.

UUID Generator

Generate random UUID v4 identifiers, one or many at a time.

Word & Character Counter

Count words, characters, sentences, and estimated reading time.

URL Encoder & Decoder

Percent-encode or decode text and URLs instantly in your browser.

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes of any text, all at once.

CSS Formatter & Beautifier

Beautify minified or messy CSS into readable, properly indented output.

Regex Tester

Test a regular expression against a string with live highlighting and capture group output.

New additions

Recently added to Formatiq.

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NAND Calculator

Calculate the bitwise NAND (NOT AND) of two integers, with a selectable 8/16/32-bit width.

NOR Calculator

Calculate the bitwise NOR (NOT OR) of two integers, with a selectable 8/16/32-bit width.

CSS Background Color Generator

Pick a color via HEX or RGB and get a ready-to-paste background-color CSS declaration.

CSS Background Image Generator

Build a background-image CSS rule from an image URL or a linear/radial gradient, with sizing and position options.

CSS Border Generator

Pick a width, style, and color to build a border CSS shorthand declaration, with a live preview and per-corner radius control.

Browse by category

Every tool is grouped by the job it does.

Formatters & Beautifiers

Clean up messy JSON, XML, HTML, CSS, JS, and SQL into readable, indented output.

32 tools

Encoders & Decoders

Free browser-based encoders and decoders: Base64, hex, URL, JWT, hashes, AES, and more. Fast, accurate, and 100% private.

19 tools

Generators

Free online generators for passwords, UUIDs, QR codes, fake data, favicons, and more - instant results, 100% private in your browser.

44 tools

Text Tools

Counters, case converters, diff checkers, and other plain-text utilities.

17 tools

Converters

Free online converters for JSON, CSV, timestamps, colors, and units - fast, accurate, and 100% private in your browser.

51 tools

Calculators

Quick math and everyday calculations: percentages, units, age, and more.

59 tools

Validators

Check JSON, XML, HTML, emails, URLs, and cron expressions for correctness.

17 tools

Browse all tools

Every formatter, converter, validator, and generator on Formatiq in one list.

239 total